M1 Garand rear sight question

M1 Garand rear sight question

I found the following list about Springfield early rear sight usage. Does anyone have the same type of information about Winchester early rear sight usage.
Thank you
c-j

SA
Checkered Windage/ Checkered Elevation
Used from start of production to 200,000.

Rear Sight Short Pinion Flush Nut
Knurled Windage/ Checkered Elevation
Used from about s/n 200,000 to 500,000.

Rear Sight Short Pinion Rounded Lock Bar
Knurled Windage/ Checkered Elevation
Used from about s/n 500,000 to 1,009,000.

Attachment 38794Springfield used the very small arrow and the small open arrow on the checkered elevation knob as shown in the first photo. Springfield also used the closed arrow too on the checkered elevation knob too.

Winchester used both the large and small open arrow on the checkered elevation knob (as ref in The Garand Stand Report No 50) second and third photo.

Winchester used the knurled or serrated elevation knob with the open arrow in the 1.2 million serial number range fourth photo at upper left

Scott Duff's WW2 book states that Winchester used the "flush nut" until around Jan 1943 than replaced with the type 2 lock bar and pinion

Thanks for the information RCS

Attachment 38802Attachment 38801Attachment 38797Attachment 38798Attachment 38799Attachment 38800Original Winchester flat rear sight covers are DuLite colored and without a number,letter or symbol while Springfield rear sight covers (without the drawing number) will have a mark such as a number/letter or symbol